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  • Chinese Optics Letters
  • Vol. 18,
  • Issue 12,
  • pp. 121902-
  • (2020)

Robust second-order correlation of twin parametric beams generated by amplified spontaneous parametric down-conversion

Kunpeng Jia, Xiaohan Wang, Xinjie Lü, Ping Xu, Zhenlin Wang, Chee Wei Wong, Gang Zhao, Yan-Xiao Gong, Zhenda Xie, and Shining Zhu

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Abstract

We report an observation of the second-order correlation between twin beams generated by amplified spontaneous parametric down-conversion operating above threshold with kilowatt-level peak power, from a periodically poled LiTaO3 crystal via a single-pass scheme. Photocurrent correlation was measured because of the bright photon streams, with raw visibility of 37.9% or 97.3% after electronic filtering. As expected in our theory, this correlation is robust and insensitive to parametric gain and detection loss, enabling important applications in optical communications, precision measurement, and nonlocal imaging.

© 2020 Chinese Laser Press

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